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Abstract
Thermal properties of seed proteins, prolamines from rice, wheat and soybean were studied by differential scanning calorimetry (DSC), thermogravimetry (TG), thermal expansion, X-ray diffraction and infrared spectroscopy. Prolamine films cast from aqueous ethanol are amorphous in the random-coil conformation. The glass transition of prolamine is observed at 160, 172 and 150C for rice, wheat and soybean, respectively. The amorphous prolamine films crystallize at 196, 205 and 199C for rice, wheat and soybean, respectively. The thermal degradation of prolamine films occurs from 228, 250 and 270C for rice, wheat and soybean, respectively.
(PCM) is one of the methods to enhance the energy-saving efficiency. PCMs have unique thermal property. It can absorb (or release) heat from (or to) the environment during phase transition to save energy [ 1 – 3 ]. Organic PCM has the
Abstract
Epoxidized palm oil (EPO) (0–12 wt%) was added into petrochemical-based epoxy blends (diglycidyl ether of bisphenol-A (DGEBA)/cycloaliphatic epoxide resin/epoxy novolac resin) to develop a thermal curable bio-based epoxy system. The thermal behaviors of the EPO, epoxy blends (EB), and bio-based epoxy blends (EB/EPO) were characterized using differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMT) and thermo-mechanical analysis (TM). The glass transition temperature (T g) and storage modulus (E′) of the EB/EPO system was reduced with the increasing of the EPO loading. This is attributed to the plasticizing effect of the EPO. It was found that epoxy blends with higher loading of EPO possessed higher coefficient of thermal expansion (CTE) and tanδ value. This is due to the increase of the free volume and chain flexibility in the three-dimensional network of the epoxy blends. The internal thermal stresses of the EB/EPO were decreased as the increasing loading of EPO, owing to the reduction of crosslink density, modulus of elasticity, and T g in the epoxy blends.
The thermal properties of cellulose carbamate with various nitrogen content are discussed. Thermal analysis was performed in air and under nitrogen atmosphere. The increase in the nitrogen content in cellulose carbamate brings about only a shift of the maximum decomposition rate towards lower temperatures. It can be concluded that cellulose carbamate heated to 320 °C is readily dehydrated and cross-linked, which results in the formation of aromatic structure.
low compatibility of bio-fillers with the matrix polymer. This deficiency in compatibility can lead to a loss of mechanical and thermal properties of the composites [ 2 , 13 ]. Therefore, a study on ways to improve the interfacial adhesion between
and articular cartilage defects [ 1 , 6 – 10 ]. Knowledge of the thermal properties of nanocomposite calcium or sodium alginate fibres is important because of their possible use as precursors for bioactive carbon structures. They can be used
concerning about ABS-co- N-PTMI ( N -p-tolylmaleimide). In this article, heat resistance ABS resin was synthesized by emulsion polymerization of N-PTMI, butadiene-Styrene latex (SB), AN and St. The thermal properties and the molecular mass of the
chemical affinity of modified surfaces. Thermal properties DSC analysis has been carried out to study first-order transitions like melting and crystallization of newly obtained materials. Results are presented in Table 3
Thermal properties of oxide glasses
Part IV. Induction period of crystallization as a criterion of thermal stability of M2OSiO2 (M = Li, Na) glass systems against crystallization
:JTAN.0000017339.26217.db . 4. Jóna , E , Nemčeková , K , Plško , A , Ondrušová , D , Šimon , P 2004 Thermal properties of oxide glasses. Part I. Verification of various criteria of thermal
Changes induced in the thermal properties of Galizian soils by the heating in laboratory conditions
Estimation of the soil temperature during a wildfire
reached during the fire The lineal and non-lineal parameter estimation procedures described in SPSS 11.5 with LSD test at the 95% probability level were used to fit the experimental data of the thermal properties of the heated samples. The values
